Synonyms for Protest:

n.

barricade, anarchy, boycott, agitation, 77, civil disobedience, 911, apostasy, agriterrorism, bioterrorism. sound off, moratorium, comment, turmoil, remark, air, rally, speak out, formulate, mass meeting, demonstration, tumult, clamor, express, sit in, pronounce on, state, articulate. grumble, take exception, expostulate, beef, set up a squawk, support, inveigh, gripe, demur, squawk, except, murmur, moan, kick, remonstrate, rant. raise the roof, kvetch, kick up a fuss/stink/argument, take something further, lodge, mutter. under threat, grudgingly, against your will, on sufferance, reluctantly, unwillingly. act (noun)
dissent, objection.
communication (noun)
protestation.
complaint, disapproval (noun)
moratorium, gripe, challenge, turmoil, grievance, rally, protestation, tumult, objection, kick, demonstration, clamor, dissent, demur.
contention (noun)
contrariety, controversy, encounter, dissidence, struggle, contention, argument, dissension, antipathy, tension, quarrel.
objection (noun)
denial, compliant, exception.
opposition (noun)
defiance, counterattack, opposition, fight, friction, repulsion, conflict, adversary, repression, obstruction, dispute, contradiction, challenge, counteraction, suppression, objection, impediment, rebuff, obstinacy, hindrance, antagonism, disagreement, confrontation, inhibition, interference, resistance.
passive resistance (noun)
civil disobedience.
protest (noun)
disparagement, grievance, detraction, deprecation, lamentation, objection, dissent, denigration, resist, complaint, protestation, scold.

v.

complain, disapprove; argue against (verb)
fight, oppose, expostulate, except, remonstrate, resist, object, disagree, squawk, contend, sound off, take exception.
contend (verb)
contend, contrast, face, vie, wrangle, hassle, wrestle, defend, argue, clash, bicker, oppose, stand, resist, dissent, withstand, brawl, antagonize, confront.
oppose (verb)
disagree, check, hinder, contradict, counteract, interfere, counter, cross, oppress, object, repress, impede, repulse, repel, defy, intercept, inhibit, meddle, obstruct, suppress.
protest (verb)
deprecate, denigrate, detract, complain, lament, disparage, ridicule, deplore, sit in, grouch.

Other synonyms:

grumble, gripe, rant. moan, clamor, remonstrate, squawk, demur, expostulate. beef, murmur, demonstration, except, exception. kick. disagree
demur.
rail
inveigh.
remonstrate
remonstrate.
Other relevant words:
expostulate, clamor, sound off, state, demonstration, speak out, moan, moratorium, except, articulate, kick, gripe, inveigh, exception, take exception, turmoil, express, murmur, boycott, rally, tumult, civil disobedience, reluctantly, beef, denial, demur, remonstrate, protestation, grumble, unwillingly, set up a squawk, squawk.